how to backwash a cartridge pool filter


Author: Poolking - Swimming Pool Equipment Manufacturer

Pool ownership is a great way to enjoy the good life, and it's also a good way to stay in shape. Keeping the pool in good condition requires regular maintenance, and one of the most important aspects of pool maintenance is cleaning the pool filter. A pool filter that is properly cleaned and maintained will last longer, perform better, and help keep your pool sparkling clean. In this article, we will discuss how to backwash your cartridge pool filter properly, so your pool stays clean and clear all season.

Why Is Backwashing Important?

In the pool filtration system, the water moves through the pool filter to remove impurities, such as dead leaves, grasses, bugs, and other debris. As the pool filter collects debris, the filter media will become clogged, which can lead to lower flow rates, reduced water pressure, and overall deterioration in the filter's performance. The cartridge pool filter's performance can be restored by backwashing, which clears out the debris and enables the filter media to function effectively.

When To Backwash Your Pool Filter?

Professional pool services will recommend a pool filter backwash frequency depending on pool usage and weather conditions. However, you can also determine the need for a backwash by yourself. When the pool water pressure gauge reading is 5-6 psi higher than the regular level or a noticeable difference in water flow, it's time to backwash the pool filter.

How to Backwash Your Pool Filter?

Here are the simple steps to follow when backwashing your filter:

Step 1: Turn off the pool pump

Before you start backwashing the filter cartage, turn off the pool pump to prevent any accidents.

Step 2: Disassemble the filter

Remove the filter from the pool and loosen any attachments. If your pool filter is a cartridge type, open the filter case and remove the filter cartridge.

Step 3: Clean the filter cartridge

The cartridges clean up involves removing debris-like debris, leaves, grit, and other materials that have accumulated in the filter cartridge. Rinse the cartridge with a hose or follow the manufacturer's suggested procedure.

Step 4: Backwash the filter media

If you have an earth or sand filter, the filter media contributes to its proper functioning. Backwashing the filter media entails reversing dirty water, which allows the filter media to clean itself. Invert the valve to recirculate water, and run the pump for a few minutes.

Step 5: Rinse the filter

Rinsing the cartridge after backwashing helps remove any debris that may have been left. Rinse the cartridge for about 2 minutes and then disassemble and reassemble the filter.


Backwashing your pool cartridge filter is easy, and as long as you follow the steps, you can do it yourself. With regular maintenance, your filter will last longer, work better, and you'll be able to enjoy your pool all season long. So make sure to backwash your pool filter every so often and keep everything clean, clear, and sparkling.


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